Xerox Corporation

Robert Arnold Gross

Michael Nicholas Soures

David Keneth Ahl

Douglas A McKeown

Youti Kuo

Robert Steven Pozniakas

David Kenneth Ahl

Michael G Petranto

David Sekovski

Mark Stevens

Kenneth W Pietrowski

Douglas W Sass

Bruce D Caryl

John Chinnici

John D McCaffrey

Edward L Schlueter, Jr

Gerald M Fletcher

Michael Quoc Lu

Lisbeth Sophia Quesnel

Joseph Herman Lang

Christopher Auguste Dirubio

James Lawton Giacobbi

David E Rollins

Raymond E Bailey

Daniel H Burnett

Michael E Beard

Dean Thomas

Ahmed-Mohsen T Shehata

Alvin J Owens

Michael W Schab

John A Wargo

David J Lemmon

Alfred J Claflin

Richard M Baran

Evan P Kastner

Elizabeth D Diehl

James E Hogle

Fredrick M Hausner

Douglas Mckeown

A method and apparatus for automatic corotron cleaning in an image production device is disclosed. The method may include receiving a first dynamic current reading, the dynamic current being the current supplied to a photoreceptor of the image production device, determining if the first dynamic current reading exceeds a predetermined threshold, the predetermined threshold being a threshold set on the allowable variation in the dynamic current value, wherein if it is determined that the first dynamic current reading exceeds the predetermined threshold, sending a signal to a cleaning device to clean the corotron, determining that the corotron has been cleaned, receiving a second current reading, determining if the second dynamic current reading exceeds the predetermined threshold, wherein if it is determined that the second dynamic current reading exceeds the predetermined threshold, sending a signal to prompt a user to replace the corotron in the image production device.

Method and apparatus for automatic corotron cleaning in an image production device

A method and apparatus for corotron cleaning management in an image production device is disclosed. The method may include receiving an input from the corotron cleaning counter, determining if the corotron cleaning counter exceeds a predetermined threshold, wherein if it is determined that the corotron cleaning counter exceeds the predetermined threshold, notifying a maintainer that the corotron requires cleaning, determining if corotron cleaning has been performed, wherein if it is determined that corotron cleaning has been performed, resetting the corotron cleaning counter.

Method and apparatus for corotron cleaning management in an image production device

Systems and methods are provided for controlling cleaning devices in image forming apparatus electrostatic image forming apparatus. Such systems may include a charge receptor, movable in a process direction, defining a main surface. A toner application device applies toner to the charge receptor, and is configured to place a lubrication stripe including the toner on a portion of the main surface of the charge receptor, the position of the lubrication stripe is controlled with respect to a position on the main surface of the charge receptor corresponding to a paper trail edge. The dimensions and density of the lubrication stripe may also be controlled. The lubrication stripe is delivered to a secondary cleaning device including a blade engaging with the photoreceptor surface to lubricate the blade.

Systems and methods for controlling cleaning devices in image forming apparatus

Aspects of the disclosure provided a method to improve performance of a cleaning device to extend a usage life of the cleaning device. The method can include obtaining a performance characteristic of an electrostatic brush that degrades operations of the electrostatic brush, determining at least one parameter that compensates for the degradation, and controlling the electrostatic brush by the at least one parameter to maintain the electrostatic brush operating within a failure boundary.

Method and apparatus for cleaning

Systems and methods are provided for controlling cleaning devices in image forming apparatus electrostatic image forming apparatus. Such systems may include a charge receptor, movable in a process direction, defining a main surface. A toner application device applies toner to the charge receptor, and is configured to place a lubrication stripe including the toner on a portion of the main surface of the charge receptor at a selected time. An influence of at least one corotron on the charge receptor is modified, during the designated rotations of the charge receptor, while the portion of the surface on which the lubrication stripe is formed, or will be formed, is passing the at least one corotron. The lubrication stripe is delivered to a secondary cleaning device including a blade engaging with the photoreceptor surface to lubricate the blade.

A diagnostic system that provides a service technician with service information during servicing of an image processing apparatus includes at least one counter that is incremented during operation of the image processing apparatus, a pressure detecting unit that detects a pressure at a point in an air flow path on the condition that the at least one counter is reset to zero after initial servicing of the image processing apparatus, a determining unit that determines whether a difference between the detected pressure and a fault threshold pressure is less than a predetermined margin, and a display unit that displays a fault code indicating additional servicing of the image processing apparatus is recommended on the condition that the determining unit determines that the difference between the detected pressure and the predetermined threshold pressure is less than the predetermined margin.

Diagnostic systems and methods for providing diagnostic information during servicing of an image processing apparatus

Systems and methods are provided for controlling cleaning devices in image forming apparatus electrostatic image forming apparatus. Such systems may include a charge receptor, movable in a process direction, defining a main surface. A toner application device applies toner to the charge receptor, and is configured to place a lubrication stripe including the toner on a portion of the main surface of the charge receptor at a selected time. An influence of a pre-clean corotron on the charge receptor is modified, during the designated rotations of the charge receptor, while the portion of the surface on which the lubrication stripe is formed, or will be formed, is passing the pre-clean corotron. The lubrication stripe is delivered to a secondary cleaning device including a blade engaging with the photoreceptor surface to lubricate the blade.

A system for reducing lead edge (LE) smearing in an electrostatographic machine is provided. The system comprises a pretransfer corotron positioned between a developing station and a transfer station in an electrostatographic imaging device. The pretransfer corotron is configured to apply a predetermined charge to at least a portion of a developed toner image on a photoreceptive surface. The predetermined charge is greater than a charge applied to the rest of the developed toner image. The system further includes a controller operably associated with the pretransfer corotron. The controller is configured to activate the pretransfer corotron to apply said predetermined charge to the developed toner image at a lead edge region of the developed toner image when leading edge smearing is detected during imaging operations.

Pretransfer toner treatment in an electrostatographic printer

An electrophotographic printing apparatus includes a housing, a photoreceptor module located inside the housing that includes a photoreceptor, a raster output system located inside the housing for projecting an electrostatic image onto the photoreceptor, a charging station, a developer station, a transfer station, a pre-fuser transport, and a fusing station. The module may be removed from an operating position inside the housing. The transfer station is connected to the pre-fuser transport so that they are constrained to move as one unit when the photoreceptor module is in its operating position inside the housing but are disconnected when the photoreceptor module is removed from its operating position inside the housing. The transfer module may be mounted so as to be constrained by a pre-fuser transport.

Transfer assembly and a method for mounting

An improved detack corotron reduces the likelihood of a paper jam arising from a curled paper edge getting caught in the corotron. The detack corotron includes an electrically conductive coronode having a plurality of field emitters, each field emitter having a terminating end, the terminating ends of the field emitters being spatially separated from one another, and a paper edge guide having a plurality of generally planar members, the generally planar members being perpendicular to the conductive coronode and the generally planar members having a height that extends above the terminating ends of the field emitters.

Paper jam-resistant detack corotron for use in an electrostatographic imaging apparatus

In a printing machine having at least one transfer device driven in response to an electrical signal and operable to transfer a medium onto a sheet, a method controls the magnitude of the electrical signal driving the transfer device. The method includes assigning a magnitude of the electrical signal for driving the transfer device to each of at least two transfer stress levels, evaluating only operating parameters of the printing machine that have a pre-determined priority value relative to a corresponding pre-determined threshold value, selecting one of the at least two transfer stress levels based on the evaluation of the at least one operating parameter, and applying the magnitude of the electrical signal corresponding to the selected stress level to the electrically-driven transfer device.

Method for adjusting transfer current in an image transfer machine

In a xerographic printing apparatus, a charge device is used to apply a charge to a photoreceptor. The charge device includes a wire. A shuttle moves along the charge device, and includes a brush wherein the sides of the bristles contact the wire. When the brush moves along the wire, an accumulation of stray particles on the wire is made relatively smooth.

Cleaning system for removing dendrites from a charging device in a xerographic printer

Sheet separation, feeding and printing with reduced image deletions of various types of print media sheets from a stack thereof, especially coated print media sheets with high humidity adhesion difficulties, is assisted by a sheet air puffer for a sheet separator/feeder having an automatically variably heated air supply. This may be accomplished by electronically obtaining information on the selected type of print media sheets to be fed from the sheet separator/feeder, and the ambient conditions, including at least the humidity, and by combining that information in an electronic look-up table additionally provided with set points to produce a control signal for variable air puffer temperature and strength.

Automatically variably heated airflow for separation of humid coated paper print media

An improved coronode assembly includes pin guards that are positioned closely spaced from and extending above a coronode in order to provide protection for a user reaching past the coronode to remove a sheet jam, and prevent coronode damage when the coronode is handled during servicing by a field service technician. The closeness of the pin guards to the coronode also serves to produce a more uniform field.

Corotron pin guard

A photoreceptor module located within a housing. The photoreceptor module includes a photoreceptor belt, a belt support to maintain the belt in a desired configuration, and a transfer assembly. The transfer assembly is operably positioned in close proximity to the belt, and may be moved away from the belt while both are within the housing to ease clearance of paper jams.

Growing community of inventors

Penfield, NY, United States of America

Robert Arnold Gross